package Thread;

/**
 * 互斥性
 * 当使用多个synchronized锁定多个代码片段,并且指定的同步监视器对象相同时,这些代码片段就是互斥的,
 * 多个线程不能同时执行这些代码片段.
 */
public class SyncDemo4 {
    public static void main(String[] args) {
        Foo foo = new Foo();
        Thread t1 = new Thread(){
            public void run() {
                foo.methodA();
            }
        };
        Thread t2 = new Thread(){
            public void run() {
                foo.methodB();
            }
        };
        t1.start();
        t2.start();
    }
}
class Foo{
        public synchronized void methodA(){
            try {
                Thread t = Thread.currentThread();
                System.out.println(t.getName()+":正在执行A方法...");
                Thread.sleep(5000);
                System.out.println("A方法执行完毕");
            } catch (InterruptedException e){
                e.printStackTrace();
            }
        }
        public synchronized void methodB(){
            try {
                Thread t = Thread.currentThread();
                System.out.println(t.getName()+":正在执行B方法");
                Thread.sleep(5000);
                System.out.println("B方法执行完毕");
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
}
